Using this 10-inch metal handled vacuum cup is easy. First, make sure the surface of the panel you want to lift is smooth. Then press the cup firmly onto the surface to create a vacuum. Once the suction is strong, you can lift the panel safely. When you're done, release the suction gently. As for maintenance, keep the cup clean and dry. Check the brass handle regularly for any signs of wear. When not in use, store it in the included carrying case. Also, don't exceed the load capacity of 331 lbs to avoid any accidents.